is string a Float number via regular expression - Android java.util.regex

Android examples for java.util.regex:Number Pattern

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Description

is string a Float number via regular expression

Demo Code

import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.util.Base64;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class Main{

    public static boolean isFloat(String str) {
        if (isLong(str)) {
            return true;
        }//from   www  .jav a  2  s  .co m
        Pattern pattern = Pattern.compile("\\d*\\.{1}\\d+");
        Matcher isNum = pattern.matcher(str);
        if (!isNum.matches()) {
            return false;
        }
        return true;
    }
    public static boolean isFloat(String str, int precision) {
        String regStr = "\\d*\\.{1}\\d{" + precision + "}";
        Pattern pattern = Pattern.compile(regStr);
        Matcher isNum = pattern.matcher(str);
        if (!isNum.matches()) {
            return false;
        }
        return true;
    }

}

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